CD274 and neoplasm: Immunohistochemical analysis revealed the following: CK20 (−), CK5/6 (+), CK7 (scattered+), GATA3 (scattered+), P40 (+), P53 (+), Ki-67 (+30%), SMA (+), and programmed death protein 1 (PD-L1) (clone number: 142) (+tumor cells, 1%; +immune cells, 3%).